Portable drill



AUS- 19" 1941. H. P. CHANDLER 2,253,363

PORTABLE DRILL Original Filed Nov. l, 193,6 3 Sheets-Sheet l H. P. CHANDLER PORTABLE DRILL Aug. 19, 1941.

3 Sheets-Sheet 2 original Filed Nov. 1o', 1936 Aug. 19, 1941.

H. P. CHANDLER PORTABLE DRILL original Filed Nov. 1o, 193e s sheets-sheet 5 `Another object of my ,depth even in 'caseswhere the ting motion and power from Patented Aug. 19, 1941 :UNITED sTATEs .PATENT OFFICE ronim Homer P. Chandler, Mansfield, Qhm assignorto `The Ollio Brass .(lompany, Mansfield; Ohio, .a corporation of NewJersey Original application November `10, 1936,'4 Serial No.

Divided and thisallplication Selltmberzo, waaseriamo. 297,140

(C1. ros-+162) 2 claims.

My invention relates "to portable drills, and particularlyfor use for drilling one or more cavi.- ties simultaneously in the heads of adjacent rail ends.

, ne of the objects of my invention is theprovision of a machine which can easily 'be moved along the track and lightenough lto be quickly removed by the operators when necessary. l Another object of my invention is to provide a drilling machine in which 'the drills can -be quickly raised when passing over switches, crossings and etc.

Another. object of my a machine in which the invention `is to provide drills may be moved .manually relative to the rail when applying the drill thereto.

`invention is to provide a machine for drilling two or more holes simultaneously in adjacent rail ends, and which holes will be of substantially uniform predetermined `faces of the rails are not in an exact alignmen `My invention resides in the new and Anovel construction,"combination, and relation of `the parts herein described and showedin the accompanying drawings.

In the drawings:

Fig. 1 isa top view-of my invention with useveral of the parts shownuirn section.

Fig. 2 is a face view of my invention shown in elevation.

Fig. 3 is an end view of my invention with some parts shown in section.

Figs. 4 and 5 are details of guides or gauges for regulating the depth to which the drills may penetrate the rail.

This application lis va division of my copending application, Serial Number 110,123, filed November l0, 1936, now Patent N0.2,18'1,11`1.

In the preferred embodiment of my invention, I employ a base member l upon which is mounted a power plant 2` which I have shown asa gasoline engine, but which may be of other suitable power. Associated with the engine is a transmission 3 connected to the engine-by means of the shaft and vcoupling 5; l n

The transmission 3 comprises a` casing 6 in which is mountedgearing suitable for transmitthe engine to the drills and at the speed required.

`I am not detailing the gearing as-there is nothing new or novel which I claim of the same. t

Associated with -the gearing are `the chucks 1 for holding the drills 8.

Secured tothe base or-frame l is a lshaft S,

.railB, I pivotally Secure Vchinegandin,alignment with the rail. arms i3 .that rail which is vend of' `which engages a which has slidably and rotatably mounted llpQn one `end a grooved wheel Vthe track rail A.

I0 for Operating ,upon

Inorder toavoid short circuiting the rails and thus interfering with the proper operation of the signal systems, I insulate the wheel l0 from the ,axles `through `the `medium of a bushing y Il Vand .washers l2 ofinsulating materials such asfiben Bakelite, etc.

.Tomount the machine upon the othertrack to .eachend 0f themaand I3. At the free ends .of the arms I3 and .13'

isa shaft L4 secured in positonbymeans 0f the .cotters .-15., Slidably ,and `Arotatably mounted upon each shaft lAis a roller I6 yieldngly held in .thedirection of `thearm I3 by means `,of a spring lr'l I Theroller L6. is .composed of two telescopically mounted :parts .1.8 `and i9. This construction permits .the roller. adjusting itselfto varioussizes `.oi-rails and. also permits moving thabody of the machine transversely .ofthe rail when operating the drills to penetratelthe rails. i

It will benotedthat the Vspring His constantly .pressingjheanges .ofthe parts 1 8 againstone sideof `therailcB anddr-awing the flanges `of the parts :I9 Vagainstthe opposite. face of the railB land at the same time drawing. the entire machine lalzerallywith` respectto therails Aand B and bringing the arms l.3 intoengagement withthe part l9.of. the rollersl which is, the normal position of vthegparts `.when the machine is not drilling a rail.V ,'-Ihus practicallythe entire ma chine, through the medium .ofthesprings l1, is .moved .and yieldingly held in .the Jdirection ,gf to be drilled, Vnamely `rail B. This means that normally the points of thedrill are yieldinglyheld spaced from the face ,of the rail which-:is to be drilled.

l `The ,arms .13 and `1 3 are .pivotallr mounted 911 thearins andi? isla projecting aum 2i which is provided with a stud 22, the Stop mit 2.3 adiustably framev of thev machine. The

issocietal` with,

mounted on the `stud 2'2 is adjustablyassolciated with the arm 2l and regulates thefposition ofthe machine body vertically with respect to the rai-l B. I-n other jwords,`-the studs 22 determine the point at Awhich the drills will enter the rail with respect to the upper and lower surfaces thereof. g

were it not for the feet that the machinemay be -used' where there is special work such as crossings, `.frogs and etc., ywould not benecessary to raise and lower the body of the machine, but on account of such special work it is desirable to have some means of easily and quickly raising the body together with the drills in order to avoid injury thereto when moving the machine through such special work.

Between the arms 2| is a spring 24 mounted upon telescopically arranged members 25 and 26,

having their ends pivotally secured to the arms 2|. Spring 24 is constantly urging the free ends of the arms 2| to move apart which in turn tends to force the rollers I6 downwardly about the pivots 20 or in other words to raise the body of the machine relative to the rail B. The spring 24 however is not suiciently strong to raise the machine bodily therefore it is intended at such times as it is desired to raise the machine from its normal drilling position, for the operator to assist the spring by applying manual force Sullicientto aid the spring 24. If the springsY were sufliciently strong to raise the machine unaided,

`then it would be necessary to use manual effort to force the machine to its drilling position and provide means to lock it in such position.

In order to hold the machine in the raised position, I employ the toggle arm 27 which is pivoted to one arm 2|, and movably secured to the other arm 2| through the medium of the slot 28. When the machine is raised through the efforts of the spring 24 and the operator, the spring will move the arms 2| about the pivots 20 to the positions shown by the dotted lines relative to the machine base. The free end of the arm 2| having the slidable connections with the toggle 21 will come to rest in the curved end 29 of the slot 28 and where it will catch and be held when the operator releases his hold upon the machine, as shown by the dotted position.

In Fig. 2 the full lines show the machine in normal drilling position in respect to the rail B, but Fig. 2 also shows the position of the drilling machine, with respect to the rail B, when the machine has been raised as described.

The normal position of the drills 8 is thatshown in Fig. 3, spaced from the face of the rail B. Means is provided for moving the drills into engagement `with the face of the rail to be drilled and to move the same as much farther as necessary to'drill the holes of the required depth. YTo effect this movement, I pivot at opposite ends of the body or frame I tubular members 30, with one end 3| positioned so as to engage the face of the rail opposite that to be drilled. The pivotal points 32 of the members 30 are placed very low, thus giving a very great leverage in moving the drills while penetrating the rail.`

Secured to the upper end of the members 30 is a yoke shaped tubular member or handle 33, by means of which the operator is able to simultaneously move the members 30 as desired. The

parts 30-3I-32 and 33 are made of very stil v, material such that there is no spring under ordinary use and therefore a pull on the part 33 at any point `will produce an equal pull on each member 30 and 3|; thus the machine body will move parallel to the rails.

The operation of the members 30 through the member 33 Vis against the tension of the springs I7; the members |4 slide transversely through the rollers I6.V

Since' theY rail head is gripped between the membersv I8 and 3|r as the operator shifts the frame, the frame is held from movement along stud 36 is a yoke the rails and no special clamping means is required.

When the operator returns the handle 33 to its inoperative position, the springs I1 move the machine body transversely of the rails to its normal position as shown in Figs. 1 and 3.

It is very important in drilling holes for rail bonds used in electrically connecting the rails, especially Where the bond is to be applied in the head of the rail, that such holes shall be of a predetermined depth especially where the bond is of such construction that it depends upon contact with the end wall of the cavity for expansion of the bond terminal.

In' Fig. 4, I show a simple means for gauging the depth of the hole which consists of a threaded stud 34 supported by and adjustable relative to the machine and held by means of a lock nut 35. The depth of the hole is gauged by the ldifference between the projection of the drill points and the stud34 from the face of the machine. This type of gaugeV is effective in drilling newly laid rails Where the faces of the rails to be drilled are in perfect alignment. i

If desired in place of a single stud 34, two studs may be employed, positioned at the points marked a: or at y. Such gauging is desirable if the members 30 should be arranged to act independent of each other or the entire frame 30-33 arranged to yield under a pull.

In Fig. 5, I show an arrangement for gauging the depth of holes in connection with track that has been laid for sometime, and in which the rails may be somewhat out of alignment. This of a lock nut 37. Adjustably mounted on the 33 arranged to engage both rails. This form of gauge gives very satisfactory results where the rails are out of alignment, but not too far as it tends to even up the depth of the holes.

In order to hold the handle 30-33 in its inoperative position, I provide a latch 39 secured to a standard 4|).

A starting crank for the engine is shown at 4| and a gas supply tank at 42.

Modifications will be apparent to those skilled 1. The combination with a machine mounted on rollers and movable along a track of means to raise and lower one end of the machine relative to the track rails in order to raise the machine to avoid obstructions when moving the the free ends of the levers and tending to force the free ends of the levers apart moving the one lever along the slot to the locking position and thereby assist the operator in raising the link and the machine against the weight thereof.

2. The raising and lowering apparatus for a machine movable long a track and including a frame, in combination with the frame a pair of levers pivotally mounted intermediate their ends upon the frame, a roller rotatably mounted on one end of each lever to engage with a rail of the track, an inverted V-shaped link having a handle to be grasped and lowering the machine, the link pivotally connectedyat one end to a free end of one lever and the other end of the link having a slot in which the free end of the other lever is pivotby an operator in raising ally and slidably mounted, a detent at one end of the slot to cooperate with the pivotal and slidable connection of the lever with the link to hold the machine in its raised position and to release the lever When the link is raised slightly by the operator when it is desired to lower the machine and yielding means positioned between the free ends of the levers constantly urging the free ends of the levers farther apart thereby tending to raise the machine, the force of said yielding means being less than the weight of the machine whereby the machine will lower by gravity when the operator releases the locking means and whereby the operator is assisted in raising the machine.

HOMER P. CHANDLER. 

